------------[ cut here ]------------
DEBUG_LOCKS_WARN_ON(!test_bit(class_idx, lock_classes_in_use))
WARNING: CPU: 0 PID: 19 at kernel/locking/lockdep.c:5172 __lock_acquire+0x15fd/0x2050 kernel/locking/lockdep.c:5172
Modules linked in:
CPU: 0 UID: 0 PID: 19 Comm: rcu_exp_gp_kthr Not tainted 6.12.0-rc6-syzkaller-00169-g906bd684e4b1 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/30/2024
RIP: 0010:__lock_acquire+0x15fd/0x2050 kernel/locking/lockdep.c:5172
Code: 0f b6 04 08 84 c0 0f 85 d7 09 00 00 83 3d 1a d8 ac 0e 00 75 19 90 48 c7 c7 60 c9 0a 8c 48 c7 c6 40 f2 0a 8c e8 44 6c e5 ff 90 <0f> 0b 90 90 90 e9 09 fe ff ff 90 0f 0b 90 e9 5f fd ff ff 90 e8 3a
RSP: 0018:ffffc90000187670 EFLAGS: 00010046
RAX: f7108018b05bce00 RBX: 0000000028f5c368 RCX: ffff88801c2abc00
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffff88801c2ac780 R08: ffffffff8155d312 R09: 1ffff110170c519a
R10: dffffc0000000000 R11: ffffed10170c519b R12: ffff88801c2abc00
R13: ffff88801c2ac6d8 R14: 0000000000000000 R15: ffff88801c2ac7a0
FS:  0000000000000000(0000) GS:ffff8880b8600000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f9836b02d48 CR3: 0000000075f08000 CR4: 0000000000350ef0
Call Trace:
 <TASK>
 lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5825
 _raw_spin_lock_nested+0x31/0x40 kernel/locking/spinlock.c:378
 raw_spin_rq_lock_nested+0x2a/0x140 kernel/sched/core.c:598
 _double_lock_balance kernel/sched/sched.h:2984 [inline]
 double_lock_balance kernel/sched/sched.h:3029 [inline]
 find_lock_lowest_rq+0x1e1/0x670 kernel/sched/rt.c:1924
 push_rt_task+0x13f/0x7e0 kernel/sched/rt.c:2057
 push_rt_tasks kernel/sched/rt.c:2107 [inline]
 task_woken_rt+0x14c/0x220 kernel/sched/rt.c:2407
 ttwu_do_activate+0x30c/0x760 kernel/sched/core.c:3692
 ttwu_queue kernel/sched/core.c:3953 [inline]
 try_to_wake_up+0x8d6/0x14b0 kernel/sched/core.c:4281
 autoremove_wake_function+0x16/0x110 kernel/sched/wait.c:384
 __wake_up_common kernel/sched/wait.c:89 [inline]
 __wake_up_common_lock+0x132/0x1e0 kernel/sched/wait.c:106
 rcu_exp_wait_wake kernel/rcu/tree_exp.h:696 [inline]
 rcu_exp_sel_wait_wake+0x18bf/0x1dc0 kernel/rcu/tree_exp.h:712
 kthread_worker_fn+0x502/0xb70 kernel/kthread.c:844
 kthread+0x2f2/0x390 kernel/kthread.c:389
 ret_from_fork+0x4d/0x80 arch/x86/kernel/process.c:147
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
 </TASK>